ADEQ Form DWAR20 (CHECKLIST) "Source Water Sampling Plan Requirements Checklist - Long Term 2 Enhanced Surface Water Treatment Rule" - Arizona

What Is ADEQ Form DWAR20 (CHECKLIST)?

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Form Details:

  • Released on January 1, 2017;
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Download ADEQ Form DWAR20 (CHECKLIST) "Source Water Sampling Plan Requirements Checklist - Long Term 2 Enhanced Surface Water Treatment Rule" - Arizona

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Long Term 2
Enhanced Surface Water Treatment Rule
(LT2ESWTR)
Source Water Sampling Plan Requirements Checklist
PWS ID Number
PWS Name
E-
Contact Name
Phone Number
Mail
Treatment Plant Surface Water (TPSW)
TPSW Name
Number
Submit completed source water intake sampling plans to ADEQ or
MCESD (if MCESD regulated), no later than date listed in this table:
Schedule and Population (or in a
combined distribution system in
Sampling Period
Plans Due
which the largest system serves)
1 (serves ≥ 100,000)
April 2015 – March 2017
January 1, 2015
2 (serves 50,000 – 99,999)
October 2015 – September 2017
July 1, 2015
3 (serves 10,000 – 49,999)
October 2016 – September 2018
July 1, 2016
October 2017 – September 2018
4 (serves < 10,000)
July 1, 2017
Instructions: Select the applicable option (A, B, C, or D) and complete the required steps.
A.
Schedule 1-4 system chooses to provide treatment for Cryptosporidium (5.5 log), instead of
Schedules 1-
sampling for E. coli or Cryptosporidium
Complete and submit a Notice of Intent to Provide Treatment (DWAR 20 (NOI) Treatment).
4
B.
Schedule 4 system chooses to sample for Cryptosporidium, instead of E. coli:
Complete and submit the Notice of Intent to sample for Cryptosporidium (DWAR 20 (NOI), Sample).
Schedule 4
1.
only
See Additional instructions and required steps for system sampling for LT2.
2.
C.
Schedule 4 system samples for E. coli
Schedule 4
See Additional instructions and required steps for system sampling for LT2.
only
D.
Schedule 1-3 system samples for Cryptosporidium, E. coli and turbidity.
Schedules 1-
See Additional instructions and required steps for system sampling for LT2.
3 only
Additional instructions and required steps for system sampling for LT2 (Option B, C, or D selected):
Select the schematic that represents the system’s source/treatment plant configuration. If none
of the first nine LT2 schematics attached to this document fit the system’s configuration, use schematic
1.
number 10, or the system may submit their own.
Mark the location of the system’s sampling point(s), and all points of chemical treatment from
the intake to the treatment plant on the selected schematic.
The system’s sampling point(s) must be representative of water entering the treatment plant.
2.
The sampling point must be prior to any chemical treatment. Contact ADEQ or MCESD for further
instructions if sampling prior to chemical treatment is proposed.
Systems that have a raw water off-stream reservoir or storage must collect samples after the raw
water storage/reservoir.
DWAR 20 (Checklist)
January 2017
Page 1 of 2
Long Term 2
Enhanced Surface Water Treatment Rule
(LT2ESWTR)
Source Water Sampling Plan Requirements Checklist
PWS ID Number
PWS Name
E-
Contact Name
Phone Number
Mail
Treatment Plant Surface Water (TPSW)
TPSW Name
Number
Submit completed source water intake sampling plans to ADEQ or
MCESD (if MCESD regulated), no later than date listed in this table:
Schedule and Population (or in a
combined distribution system in
Sampling Period
Plans Due
which the largest system serves)
1 (serves ≥ 100,000)
April 2015 – March 2017
January 1, 2015
2 (serves 50,000 – 99,999)
October 2015 – September 2017
July 1, 2015
3 (serves 10,000 – 49,999)
October 2016 – September 2018
July 1, 2016
October 2017 – September 2018
4 (serves < 10,000)
July 1, 2017
Instructions: Select the applicable option (A, B, C, or D) and complete the required steps.
A.
Schedule 1-4 system chooses to provide treatment for Cryptosporidium (5.5 log), instead of
Schedules 1-
sampling for E. coli or Cryptosporidium
Complete and submit a Notice of Intent to Provide Treatment (DWAR 20 (NOI) Treatment).
4
B.
Schedule 4 system chooses to sample for Cryptosporidium, instead of E. coli:
Complete and submit the Notice of Intent to sample for Cryptosporidium (DWAR 20 (NOI), Sample).
Schedule 4
1.
only
See Additional instructions and required steps for system sampling for LT2.
2.
C.
Schedule 4 system samples for E. coli
Schedule 4
See Additional instructions and required steps for system sampling for LT2.
only
D.
Schedule 1-3 system samples for Cryptosporidium, E. coli and turbidity.
Schedules 1-
See Additional instructions and required steps for system sampling for LT2.
3 only
Additional instructions and required steps for system sampling for LT2 (Option B, C, or D selected):
Select the schematic that represents the system’s source/treatment plant configuration. If none
of the first nine LT2 schematics attached to this document fit the system’s configuration, use schematic
1.
number 10, or the system may submit their own.
Mark the location of the system’s sampling point(s), and all points of chemical treatment from
the intake to the treatment plant on the selected schematic.
The system’s sampling point(s) must be representative of water entering the treatment plant.
2.
The sampling point must be prior to any chemical treatment. Contact ADEQ or MCESD for further
instructions if sampling prior to chemical treatment is proposed.
Systems that have a raw water off-stream reservoir or storage must collect samples after the raw
water storage/reservoir.
DWAR 20 (Checklist)
January 2017
Page 1 of 2
Long Term 2
Enhanced Surface Water Treatment Rule
(LT2ESWTR)
Source Water Sampling Plan Requirements Checklist
Systems that apply copper sulfate into the reservoir(s) must include this information in the sampling
worksheet. Systems should maximize the amount of time between the application of copper sulfate
and the collection of samples.
Systems that recycle their filter backwash water must indicate the point where the recycled
backwash re-enters the treatment process.
The sampling point must be prior to the point where any filter backwash is recycled back into the
treatment process.
Systems that recycle their filter backwash into the reservoir(s) must provide these details in the
worksheet.
Systems that have more than one source must collect samples after all raw water sources are combined
if a sampling tap is available. Raw water samples not combined prior to treatment may require
composite samples from each source (recommended if no combined sample tap is available), or
separate analyses from each source with a calculated weighted average.
Complete a “Sampling Location Worksheet” for each surface water source sampling intake
3.
location using DWAR 20 (Worksheet).
Provide laboratory Information for each lab used (duplicate table as needed):
Laboratory Name
Laboratory ID Number
Contact Name
Phone Number
4.
Laboratory Name
Laboratory ID Number
Contact Name
Phone Number
The system must select and use a laboratory using U.S. EPA approved methods that is certified by
Arizona Department of Health Services for Cryptosporidium (Schedule 1-3 systems), and E. coli
enumeration (counting) (Schedule 1-4 systems).
5.
Select and submit the sampling dates:
Use the enclosed calendar to select the days in the appropriate monitoring period, on which the
system will be collecting samples (use key at top of page 1).
Samples must be collected within a five day window (the date selected, plus or minus 2 days).
Schedule 4 systems must collect E. coli samples on at least a biweekly basis (every two weeks) for
one year beginning in October 2017.
Monitoring Begin Date
Monitoring End Date
If the system chooses to collect samples on a more frequent basis (e.g., weekly), the samples must be
evenly spaced throughout the monitoring period.
Submit both pages of DWAR 20 (Checklist), and all required information from A, B, C, or D
to the system’s regulatory agency:
LT2 Rule Specialist
Manager
Drinking Water Monitoring and Protection Unit
Safe Drinking Water Program
Arizona Department of Environmental Quality
Maricopa County Environmental Services Department
1110 W. Washington St., Mail Code 5415 B-2
1001 N Central Avenue, Suite 250
Phoenix, AZ 85007
Phoenix, AZ 85004
lt2rule@azdeq.gov
Desk: 602.506.6935 | Fax: 602.372.0866
sdwquestions@mail.maricopa.gov
DWAR 20 (Checklist)
January 2017
Page 2 of 2
LT2 SOURCE WATER MONITORING SAMPLING CALENDAR
PWS Name:
PWS ID #:
TPSW #:
2017
October
November
December
S
M
T
W
T
F
S
S
M
T
W
T
F
S
S
M
T
W
T
F
S
1
2
3
4
5
6
7
1
2
3
4
1
2
8
9
10
11
12
13
14
5
6
7
8
9
10
11
3
4
5
6
7
8
9
15
16
17
18
19
20
21
12
13
14
15
16
17
18
10
11
12
13
14
15
16
22
23
24
25
26
27
28
19
20
21
22
23
24
25
17
18
19
20
21
22
23
29
30
31
26
27
28
29
30
24
25
26
27
28
29
30
31
2018
January
February
March
S
M
T
W
T
F
S
S
M
T
W
T
F
S
S
M
T
W
T
F
S
1
2
3
4
5
6
1
2
3
1
2
3
7
8
9
10
11
12
13
4
5
6
7
8
9
10
4
5
6
7
8
9
10
14
15
16
17
18
19
20
11
12
13
14
15
16
17
11
12
13
14
15
16
17
21
22
23
24
25
26
27
18
19
20
21
22
23
24
18
19
20
21
22
23
24
28
29
30
31
25
26
27
28
25
26
27
28
29
30
31
April
May
June
S
M
T
W
T
F
S
S
M
T
W
T
F
S
S
M
T
W
T
F
S
1
2
3
4
5
6
7
1
2
3
4
5
1
2
8
9
10
11
12
13
14
6
7
8
9
10
11
12
3
4
5
6
7
8
9
15
16
17
18
19
20
21
13
14
15
16
17
18
19
10
11
12
13
14
15
16
22
23
24
25
26
27
28
20
21
22
23
24
25
26
17
18
19
20
21
22
23
29
30
27
28
29
30
31
24
25
26
27
28
29
30
July
August
September
S
M
T
W
T
F
S
S
M
T
W
T
F
S
S
M
T
W
T
F
S
1
2
3
4
5
6
7
1
2
3
4
1
8
9
10
11
12
13
14
5
6
7
8
9
10
11
2
3
4
5
6
7
8
15
16
17
18
19
20
21
12
13
14
15
16
17
18
9
10
11
12
13
14
15
22
23
24
25
26
27
28
19
20
21
22
23
24
25
16
17
18
19
20
21
22
29
30
31
26
27
28
29
30
31
23
24
25
26
27
28
29
30
Long Term 2 Enhanced Surface Water Treatment
Rule (LT2ESWTR) System Schematic Diagrams
Figure 1. Sample Tap before Chemical Treatment
and Backwash Water Recycle (if applicable)
Raw water
chem'fcal bUlldlng
Water treatment plant
LT2
Raw
Intake
water
samplt
/
point
"
., .,
'
,
'· ,
'
.,
.,
'
.,
'
'
'
.,
,.
'
,/
,.
'
'
.,
.,
Backwash water
,. ,.
',
'
,recycle
applicable)
(If
.,
,.
.,
'
L T2 Rule: Systems must collect source water
.,
',
<===,
.,
Backwash water
samples prior to chemical treatment [40 CFR §
',
;
.,
,.
'
lagoon·
',
141.703(b)(1)l, unless approved by the State fo
collect sourc. e water s�mples·after ch�mical
treatment [40 CFR § 141. 703(b)(2)]. Systems that
recycle filter backwash water must collect source
mi•
0
'
water samples prior to the point of filter backwash
water addition [40 CFR § 141.703(c)].
LT2
s�mple
point
:
Backwash"water
recycle
(if applicable)
Page of 14